參數(shù)資料
型號： TPS7250Y
廠商： Texas Instruments, Inc.
英文描述： MICROPOWER LOW-DROPOUT LDO VOLTAGE REGULATORS
中文描述： 微功率低壓差LDO穩(wěn)壓器
文件頁數(shù)： 7/36頁
文件大?。?/td> 623K
代理商： TPS7250Y
TPS7201Q, TPS7225Q, TPS7228Q, TPS7230Q
TPS7233Q, TPS7248Q, TPS7250Q, TPS72xxY
MICROPOWER LOW-DROPOUT (LDO) VOLTAGE REGULATORS
SLVS102F – MARCH 1995 – REVISED NOVEMBER 1998
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TPS7201Q electrical characteristics, I
O
= 10 mA, V
I
= 3.5 V, EN = 0 V, C
O
= 4.7
μ
F (CSR
= 1
), FB
shorted to OUT at device leads (unless otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
TPS7201Q
TYP
1.188
UNIT
MIN
MAX
Reference voltage (measured
at FB with OUT connected to
FB)
VI = 3.5 V,
3 V
≤
VI
≤
10 V,
See Note 2
IO = 10 mA
5 mA
≤
IO
≤
250 mA,
25
°
C
V
g (
–40
°
C to 125
°
C
1.152
1.224
V
Reference voltage
temperature coefficient
–40
°
C to 125
°
C
31
75
ppm/
°
C
VI = 2.4 V,§
VI = 2.4 V,§
50
μ
A
≤
IO
≤
100 mA
100 mA
≤
IO
≤
200 mA
25
°
C
25
°
C
25
°
C
2.1
2.9
Pass-element series
resistance (see Note 3)
VI= 2 9 V
VI = 2.9 V,
μ
≤
50
A
IO
≤
250 mA
1.6
2.7
–40
°
C to 125
°
C
25
°
C
25
°
C
25
°
C
–40
°
C to 125
°
C
25
°
C
–40
°
C to 125
°
C
25
°
C
–40
°
C to 125
°
C
25
°
C
–40
°
C to 125
°
C
25
°
C
–40
°
C to 125
°
C
25
°
C
25
°
C
25
°
C
25
°
C
4.5
VI = 3.9 V,
VI = 5.9 V,
VI = 3 V to 10 V,
See Note 2
50
μ
A
≤
IO
≤
250 mA
50
μ
A
≤
IO
≤
250 mA
50
A
≤
IO
≤
250 mA,
μ
1
0.8
Input regulation
23
mV
36
IO = 5 mA to 250 mA,
See Note 2
3 V
≤
VI
≤
10 V,
15
25
Output regulation
36
mV
IO = 50
μ
A to 250 mA,
See Note 2
3 V
≤
VI
≤
10 V,
17
27
43
IO= 50
μ
IO = 50
A
49
60
Ripple rejection
f = 120 Hz
32
dB
IO = 250 mA,
See Note 2
45
50
30
Output noise spectral density
f = 120 Hz
2
μ
V/
√
Hz
≤
≤
10 Hz
f
100 kHz,
CSR= 1
CO = 4.7
μ
F
CO = 10
μ
F
CO = 100
μ
F
235
Output noise voltage
190
μ
Vrms
CSR = 1
125
0.95
×
PG trip-threshold voltage
VFB voltage decreasing from above VPG
–40
°
C to 125
°
C
VFB(nom)
V
PG hysteresis voltage
Measured at VFB
25
°
C
12
mV
PG output low voltage
IPG= 400
μ
IPG = 400
A,
VI= 2 13 V
VI = 2.13 V
25
°
C
0.1
0.4
V
–40
°
C to 125
°
C
25
°
C
–40
°
C to 125
°
C
0.4
FB input current
–10
–20
0.1
10
20
nA
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance
to CO.
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must
be taken into account separately.
§This voltage is not recommended.
Output voltage programmed to 2.5 V with closed-loop configuration (see application information).
NOTES:
2. When VI < 2.9 V and IO > 100 mA simultaneously, pass element rDS(on) increases (see Figure 10) to a point such that the resulting
dropout voltage prevents the regulator from maintaining the specified tolerance range.
3. To calculate dropout voltage, use equation:
VDO = IO
rDS(on)
rDS(on) is a function of both output current and input voltage. The parametric table lists rDS(on) for VI = 2.4 V, 2.9 V, 3.9 V, and
5.9 V, which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V, 4 V, and 6 V, respectively. For other
programmed values, refer to Figures 10 and 11.
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